function index(tbl){
	if(user()==null){
		return ">>:login?goto=sale/"
	}
	var pageNumber=1;
	if(tbl.pageNumber!=undefined){
		pageNumber=tbl.pageNumber
	}
	var cnd=Cnd.where("price",">",0).desc("id")
	
	var courses=$pager("course",cnd,pageNumber,10)
	return courses;
}